{"id":4882,"date":"2026-08-13T13:56:27","date_gmt":"2026-08-13T05:56:27","guid":{"rendered":"https:\/\/www.pgeneral.com\/?p=4882"},"modified":"2026-08-13T13:56:27","modified_gmt":"2026-08-13T05:56:27","slug":"determination-of-lead-in-sodium-pyrophosphate-food-additive","status":"publish","type":"post","link":"https:\/\/www.pgeneral.com\/es\/applications\/determination-of-lead-in-sodium-pyrophosphate-food-additive","title":{"rendered":"Determinaci\u00f3n de plomo en el aditivo alimentario pirofosfato de sodio"},"content":{"rendered":"<h2><strong><b>1 Descripci\u00f3n general del m\u00e9todo<\/b><\/strong><\/h2>\n<p>Tras el pretratamiento de la muestra, los iones de plomo forman un complejo con dietilditiocarbamato de sodio (DDTC) bajo un pH espec\u00edfico. Este complejo se extrae y separa mediante 4-metil-2-pentanona (MIBK), y posteriormente se introduce en un espectr\u00f3metro de absorci\u00f3n at\u00f3mica para su atomizaci\u00f3n por llama. La absorbancia se mide a una longitud de onda de 283,3 nm. Dentro de un determinado rango de concentraci\u00f3n, la absorbancia del plomo es proporcional a su contenido m\u00e1sico, y la cuantificaci\u00f3n se realiza por comparaci\u00f3n con una serie est\u00e1ndar.<\/p>\n<h2><strong><b>2 \u00c1mbito de aplicaci\u00f3n<\/b><\/strong><\/h2>\n<p>Este m\u00e9todo se aplica a la determinaci\u00f3n de plomo en el aditivo alimentario pirofosfato de sodio.<\/p>\n<h2><strong><b>3 Normas de Referencia<\/b><\/strong><\/h2>\n<p>GB 25557-2010 Norma Nacional de Seguridad Alimentaria \u2013 Aditivo Alimentario Pirofosfato de Sodio, Secci\u00f3n A.10 Determinaci\u00f3n de Plomo<\/p>\n<h2><strong><b>4. Instrumentos, equipos y reactivos<\/b><\/strong><\/h2>\n<h3><strong><b>4.1 Instrumentos y equipos<\/b><\/strong><\/h3>\n<h4><strong><b>4.1.1 Instrumentos anal\u00edticos<\/b><\/strong><\/h4>\n<p>hoja<\/p>\n<table>\n<tbody>\n<tr>\n<td><strong><b>\u00a1No! No!<\/b><\/strong><\/td>\n<td><strong><b>Nombre<\/b><\/strong><\/td>\n<td><strong><b>Cantidad<\/b><\/strong><\/td>\n<td><strong><b>Requisitos t\u00e9cnicos<\/b><\/strong><\/td>\n<td><strong><b>Accesorios<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>Espectrofot\u00f3metro de absorci\u00f3n at\u00f3mica de llama<\/td>\n<td>1 conjunto<\/td>\n<td>\u2014<\/td>\n<td>L\u00e1mpara cat\u00f3dica hueca de plomo<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Compresor de aire<\/td>\n<td>1 unidad<\/td>\n<td>Presi\u00f3n nominal de escape: 0,3 MPa<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>Cilindro de acetileno<\/td>\n<td>1 cilindro<\/td>\n<td>Pureza \u2265 99,99%<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>","protected":false},"excerpt":{"rendered":"<p>1 Method Overview After sample pretreatment, lead ions form a complex with sodium diethyldithiocarbamate (DDTC) under a specific pH condition. The complex is extracted and separated using 4-methyl-2-pentanone (MIBK), then introduced into an atomic absorption spectrometer for flame atomization. Absorbance is measured at a wavelength of 283.3 nm. Within a certain concentration range, the absorbance [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4824,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[36,77],"tags":[],"class_list":["post-4882","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-applications","category-bio-tech-and-life-sciences"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/posts\/4882","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/comments?post=4882"}],"version-history":[{"count":1,"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/posts\/4882\/revisions"}],"predecessor-version":[{"id":4883,"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/posts\/4882\/revisions\/4883"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/media\/4824"}],"wp:attachment":[{"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/media?parent=4882"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/categories?post=4882"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pgeneral.com\/es\/wp-json\/wp\/v2\/tags?post=4882"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}